Tapered Head Ejector Punches WPC Treatment

These tapered-head ejector punches are used in injection mold and die tooling where consistent ejection force and wear resistance are required. The tapered head geometry helps guide the punch during stroke, supporting stable contact in heavy-load ejection applications such as automotive connector housings and under-hood component molding.

In appliance and industrial enclosure tooling, the single-stepped shank improves guidance and alignment under repeated press cycles, which helps reduce vibration and uneven wear during ejector operation.

For die sets with frequent cycle times—where ejector tips experience sliding and impact—this variant’s WPC surface treatment is suited to improve wear life while maintaining reliable punch performance with standard tip geometry (Tip shape A).

• Automotive connector and housing molds: tapered head for stable guided ejection.
• Industrial enclosure/consumer appliance molds: stepped shank for consistent alignment under load.
• High-cycle die sets: WPC treatment to resist tip wear for longer service life.

The punches are made from powdered high-speed steel with an SKH51-equivalent grade (commonly referenced as an AISI M2-equivalent class in high-speed steel families). Powder metallurgy helps refine carbides, supporting improved wear behavior for ejector applications.

With WPC surface treatment, the design targets enhanced wear resistance at the punch working areas while retaining the base steel’s toughness for repeated strokes. Compared with more general-purpose tool steels, high-speed steel offers better resistance to abrasion and thermal effects during frequent molding cycles.

• Heat treatment state: specified as SKH51-equivalent high-speed steel; final hardness is not provided in the data, so users should confirm the supplied heat-treatment condition with the tool build sheet.
• Wear vs. toughness: optimized for abrasive tip wear; excessive loads may still require cavity/core wear management.

Select the ejector punch dimensions to match the mold’s ejector plate spacing and the required penetration path through the core/cavity. Your configuration must fit both the shank diameter (D) and the available opening/guide clearance in the mold.

• Shank diameter (D): choose one of 8, 10, 13, or 16 mm to match the ejector bore/guide constraints.
• Tip length (B): select from the provided L/S ranges (tip length options correspond to the series’ variable B).
• Tip dimension (P): match the required standard tip geometry size using the ranges: 4–7.99, 5–9.99, 6–12.99, or 10–15.99 mm.

The L (overall length) must cover the full travel and engagement needed for ejection. Available L ranges include 60–80, 60–90, 70–100, 50–80, 55–90, and 65–100 mm; select the shortest length that still ensures stable contact through the ejector stroke. Tolerance and fit are governed by the mold’s guiding system; ensure sufficient clearance around D for installation and thermal expansion.